The Day of Buddha’s Conception and Birth
By Biswadeb Mukherjee
Summary
Biśwadeb Mukherjee surveys early Buddhist literature to determine when Buddhist tradition fixed the dates of the Buddha’s conception and birth. He notes that the Mahāpadāna Sutta and the Acchariyabbhūta‑dhamma Sutta describe the Bodhisattva’s descent from Tuṣita heaven into his mother’s womb and a gestation of ten months without specifying a day. Chinese versions of these suttas likewise record the descent but omit any date, suggesting that early Buddhists did not emphasise the time element. Mukherjee then contrasts these early accounts with later texts. The Hsiu‑Hsing‑Pen‑Chi Ching, translated into Chinese in the second century AD, states that the Bodhisattva entered the womb on the eighth day of the fourth month and was born on the eighth day of the fourth month after ten months of gestation. Later Sarvāstivādin and Lokottaravādin works, including the Garbhāvakrānti‑parivarta, Janmaparivarta, the Sanskrit Lalitavistara and the Mahāvastu, introduce elements such as the full moon (Pūrṇimā) and the Pusya constellation. Mukherjee identifies three strands of tradition: (1) an early Sarvāstivādin tradition that placed both conception and birth on the eighth day of the lunar month of Vaiśākha; (2) a tradition in the Kulaparivisuddhi‑parivarta that the Bodhisattva was conceived when the moon was in Pusya and born on a full‑moon day; (3) a Lokottaravādin tradition that the conception occurred on the Vaiśākha Pūrṇimā and, following a ten‑month gestation, the birth therefore fell on the Phālguna Pūrṇimā. He argues that the Pūrṇimā and Pusya elements were alien to the early Sarvāstivādin tradition and were introduced by the Lokottaravādins, perhaps to align the Buddha’s conception with auspicious lunar conditions. The conflation of Vaiśākha, Pūrṇimā and Pusya in later legends led to chronological confusion. Mukherjee concludes that the diversity of accounts reflects doctrinal evolution rather than a historical memory of specific dates. Early Buddhism appears unconcerned with exact dates, while later sects retroactively supplied auspicious timings to enhance the miraculous aspects of the Buddha’s life.
Conclusion
By comparing Pāli, Sanskrit and Chinese texts, Mukherjee demonstrates that Buddhist tradition evolved from silence on the exact dates of conception and birth to a variety of sectarian theories. Early suttas emphasise a ten‑month gestation but no day, whereas later texts associate the events with lunar festivals. The study shows that the fixation of dates was driven more by doctrinal and ritual considerations than by historical memory and highlights the fluidity of myth‑making within Buddhist communities.